Method of waterproofing hollow-tile walls



NOV. 12, 1929. w, zA ss'g 1,735,447

METHOD OF WATERPROOFING HOLLOW TILE WALLS Filed Aug. 20, 1928 INVENTOR, Mil/W 5 W;

Patented Nov. 12,1929

WILLIAM ZAISSER, or BROOKLYN, NEW YORK METHOD OF WATERIPROOFI1\TG HOLLOW-TILE'WALLS' Application filed August 20, 1928. I Serial No. 300,811.

This invention relates to a method of waterproofing hollow tile walls and has for an object the lowering of the cost of waterproofing in constructions of this kind and applying waterproofing to corrugated hollow tile without impairing the bond between the tile and the mortar. Other objects of the invention will be understood from'the following specification and the accompanying drawings, in which, Fig. 1, is anelevation of the inside of an exterior wall before plastering with my system of waterproofing applied to part of thewall, Fig. '2 is a side elevation of a wall corresponding to Fig. 1,

Fig. 3 is a plan view in section of a portion of a wall constructed according to my invention and Fig. 4: is a roll of Waterproofing tape for use in practising my invention.

. The usual exterior wall construction for tall buildings comprises a hollow tile wall faced with brick and supported by thespandrel beam of the frame construction. It has been found in practice that moisture leaks through the mortar seams which apparently become loose or porous under the vibration to which the building is subjected. This moisture finds its way through the mortar between the tile blocks and eventually ap-' pears on the inside of the wall.

It has been common practice to paint the interior of these walls with a mastic waterproofing compound before plastering. Thls however, does not cure the trouble as 1t does not effectively waterproof the mortar joint' particularly when this joint becomes slightly loosened under vibration and ultimately dampness appears through the plaster which is very diflicult to remedy.

Concrete walls are usually waterproofed by one or more coatings of waterproof felt applied with a waterproof adhesive and backed with brick or other protective covering. This makes an effective waterproofing but cannot be applied to the usual commercial hollow tile.

The face of the hollowtile blocks, as is well known, is corrugated with dovetailed ooves to form a bond for the mortar and or this reason a waterproofing felt cannot be applied to the surface of the tile and the system of is waterproof and if the joints'can be water- ,cated at 16 and the mortar joints of the tile waterproofingeffective on concrete cannot be applied to hollow tile without destroying the bond betweenthe mortar and the tile.

The ordinary clay building tile of itself proofed the entire wall will be waterproof. In my invention 1 provide strips of waterproofing fabric applied with a mastic to cover the mortar joints and to form a water proof seal between adjoining tile; This leavesthe corrugated face of the tile exposed toreceive the plaster, is quickly and easily applied and saves material. The strip is supported by the plaster and is adhesively se-' cured to the tile and is an effective waterproof seal of the mortar joints without regard to the condition of the mortar. i

In. the drawings, 11 is, a tile of the usual type known as a backer and 12 is a header which is recessed to receive the head row'of. brick 14 of the brick veneer 13.- This wall" construction is usually supported on a span-l drel beam 15 of the frame construction.

The mortar joints of the brick are indiare indicated at 17, these joints areconnected as indicated in Fig. 2 with the result that moisture finding its .way through the brick also finds its way to the rear of the tile. The tile is corrugated with dovetail corrugations. 18 to form a bond for the'plaster 19. The tile is hollow as indicated by the apertures 20, Fig. 3.

The mortar joints between the tiles are coated with a waterproofing mastic as at 24 Fig. 3, comprising asphalt, talc and asbestos v fibre applied in a liquid or pasty form over the adjoining surfaces of the tile. I

A corded cotton fabric saturated with asphalt is provided in rolls, as in Fig. 4: at 27 and is applied at 26 to the horizontal seams and at 25 to the vertical seams, the 7 vertical strips passing over the horizontalstrips. After these strips are in place the mortar 19 is applied as a covering and is bonded into the grooves in the tile.

These strips applied with the mastic form a waterproof seal between adjoining tile, do

not interfere with the bonding of the plaster rFIi E fabric :band applied in 'continuous lengths structed. from dovetailed hollow tile with mortarjoints between adjoining tiles, a mastic coating comprising asphalt, talc and asbestos fibre for said joints overlapping the edges of said tile, a waterproof fabric "band applied to said tile to cover and-seal said joints and a plaster coating 'for saidtile bonded into said dovetailed grooves and covering :said 1 band.

. 2. in a waterproofin'gsysteni for hollow tile walls, the combination of a wall "constiucted froin "dOVEiZflIlGCi hollow tile with inort ar oin ts between ad o1n1ng tiles, a mastic coating comprising asphalt, talc and v asbestos :fibre for said joints overlapping the "edges of said tile, a waterprooi to the horizontal .joints of said tile and vertical strips applied to the vertical joints of'said tile-and overlapping the horizontal strips, said bands forming a waterproof seal between the horizontal and the vertic'al-jjoints of said tile and a plaster coating rforv saidi tile bonded :into said dovetailed grooves and covering *said bands In testimony whereof I affix my signature.

. WILLIAM ZAISSER. 

